﻿//  Copyright 2015 Google Inc. All Rights Reserved.
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//  http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.

using NtCoreLib;
using System;
using System.Text;
using System.Windows.Forms;

namespace EditSection;

class SectionTreeNode : TreeNode
{
    private NtHandle _ent;

    private static string FormatText(NtHandle ent)
    {
        string size = string.Empty;
        try
        {
            using NtSection section = NtSection.DuplicateFrom(ent.ProcessId, new IntPtr(ent.Handle), SectionAccessRights.Query);
            size = section.Size.ToString();
        }
        catch (NtException)
        {
            size = "Unknown";
        }

        StringBuilder builder = new();
        NtType section_type = NtType.GetTypeByType<NtSection>();

        if (section_type.HasReadPermission(ent.GrantedAccess))
        {
            builder.Append("R");
        }

        if (section_type.HasWritePermission(ent.GrantedAccess))
        {
            builder.Append("W");
        }

        return $"[{ent.Handle}/0x{ent.Handle:X}] {ent.Name} Size: {size} Access: {builder}";
    }

    public SectionTreeNode(NtHandle ent)
        : base(FormatText(ent))
    {
        _ent = ent;
    }

    public NtMappedSection OpenMappedFile(bool writable)
    {
        SectionAccessRights accessRights = SectionAccessRights.MapRead;

        if (writable)
        {
            accessRights |= SectionAccessRights.MapWrite;
        }

        using NtSection section = NtSection.DuplicateFrom(_ent.ProcessId, new IntPtr(_ent.Handle), accessRights);
        return section.Map(writable ? MemoryAllocationProtect.ReadWrite : MemoryAllocationProtect.ReadOnly);
    }

    public NtHandle SectionHandle { get { return _ent; } }
}
